Avro Lancaster photo needed

Mike, as you can see, a higher resolution image of the turret interior could be a considerable benefit. Yes please, I like a copy of the original. It’s very kind of you. My email is mikehoulder-at-yahoo.com As always replace -at-
Mike

Mike

If you like, I can send you a copy of the original interior photo.

Vertical Channel Supports

Geoff, I’ll do my very best.
Which is it you want?
This

or this

If it’s the first, then more photos would help. I will have to calculate the dimensions using what I know of the turret bowl and the frames H & J
Mike

Ive got wreckage here might be able to get a slightly better pic….now Mike heres the quid pro quo….Ineed the dimensions of that “support bracket”

Give me 24 hrs. and i will photo and measure what I have

Brilliant Stuff!!!

Thank you greatly Geoff. Your description gives a support sequence which runs like this:

Frame K -> Turret Support Bracket (Geoff’s angled plate) on top of K -> Vertical Channel Support -> Turret Bowl Angled Face -> Turret Deck and Longeron

The critical difference is that I was looking for a vertical channel support directly connecting the turret support bracket to the deck and/or longeron. But from your description the static and dynamic forces pass through the turret bowl between the longeron and frame K. That I never thought of. Brilliant.

In fact, this is shown in turretboy’s 3rd photo. I was very excited to see that photo, turretboy. I’ve been dreaming of getting one like that for ages.
Here’s your photo again with some identification overlaid.

I presume that the two circular insets show Geoff’s Vertical Channel Supports. Is that correct, Geoff? There seems to be 7 of them in all. 2 on the channel beam stretching across frame G. 1 each for frames H, K either side and 1 at the nose.

In this game, of course, the answer to one question produces yet another question. At least 3 of the vertical channel supports seem to have a Philips head screw. Now what would that be for? I can’t believe the roll and pitch angles of the turret bowl and deck could be adjusted or could they? If so, the deck and bowl are independent of the longeron since that obviously cannot be adjusted.

One thing also that is very good. The gap between frame K and the longeron is much smaller than I have drawn. So that is one major error identified and to be eliminated

Thank you so much, all three of you
Mike

Mike,your guess is sort of correct….explaining this is hard so here we go..Frame “k” has the angled plate fixed to its top edge as you show ,in the middle and normal to the frame ring is a ertical channel support.This support is fixed at its top front face to the “longeron [the hooped angle that runs around the turret deck and finaly ends at frame”e” angle doubler]

Its aft face fits to the turret bowl lower angled face
The shell plating is the riveted over the front face as you can see in the pictures

I have just read this back and it seems to make sense to me

another….

Looks like the skin overlaps…

Reinforcing skin plates

“The hip bone is connected to the leg bone” etc etc

The turret ring rests on the turret deck. The turret deck is supported by the main longeron which, in turn, at the side s by frames J and H. The deck is supported at the rear by a channel bar stretching across frame G. But what about at the front?

Here’s frame K with the turret support bracket indicated (it’s called this in the Avro drawing). It looks as though it is intended to support the longeron at the front.

Unfortunately, the longeron, turret deck and ring are angled up at the front which leaves a most uncomfortable gap between this bracket and the longeron/turret ring and deck.

There must be some support to avoid instability. But what is it? I’m thinking it may be external reinforcing skin plates of the form I suggest in my drawing. You can just see something like this in my photo if you blow it up.
Mike

Mike, I am not sure what you are looking for but there is nothing like in your drawing fitted.